Commit 84cac654 authored by Andrew Turner's avatar Andrew Turner
Browse files

Revert r334035 for now. It breaks the boot on some boards as er expect to

be able to read UEFI RuntimeData memory via the DMAP region.
parent be9292a8
......@@ -586,100 +586,33 @@ pmap_early_vtophys(vm_offset_t l1pt, vm_offset_t va)
return ((l2[l2_slot] & ~ATTR_MASK) + (va & L2_OFFSET));
}
static vm_offset_t
pmap_bootstrap_dmap(vm_offset_t kern_l1, vm_paddr_t min_pa,
vm_offset_t freemempos)
static void
pmap_bootstrap_dmap(vm_offset_t kern_l1, vm_paddr_t min_pa, vm_paddr_t max_pa)
{
pt_entry_t *l2;
vm_offset_t va;
vm_paddr_t l2_pa, pa;
u_int l1_slot, l2_slot, prev_l1_slot;
vm_paddr_t pa;
u_int l1_slot;
int i;
dmap_phys_base = min_pa & ~L1_OFFSET;
dmap_phys_max = 0;
dmap_max_addr = 0;
l2 = NULL;
prev_l1_slot = -1;
#define DMAP_TABLES ((DMAP_MAX_ADDRESS - DMAP_MIN_ADDRESS) >> L0_SHIFT)
memset(pagetable_dmap, 0, PAGE_SIZE * DMAP_TABLES);
for (i = 0; i < (physmap_idx * 2); i += 2) {
pa = physmap[i] & ~L2_OFFSET;
pa = physmap[i] & ~L1_OFFSET;
va = pa - dmap_phys_base + DMAP_MIN_ADDRESS;
/* Create L2 mappings at the start of the region */
if ((pa & L1_OFFSET) != 0) {
l1_slot = ((va - DMAP_MIN_ADDRESS) >> L1_SHIFT);
if (l1_slot != prev_l1_slot) {
prev_l1_slot = l1_slot;
l2 = (pt_entry_t *)freemempos;
l2_pa = pmap_early_vtophys(kern_l1,
(vm_offset_t)l2);
freemempos += PAGE_SIZE;
pmap_load_store(&pagetable_dmap[l1_slot],
(l2_pa & ~Ln_TABLE_MASK) | L1_TABLE);
memset(l2, 0, PAGE_SIZE);
}
KASSERT(l2 != NULL,
("pmap_bootstrap_dmap: NULL l2 map"));
for (; va < DMAP_MAX_ADDRESS && pa < physmap[i + 1];
pa += L2_SIZE, va += L2_SIZE) {
/*
* We are on a boundary, stop to
* create a level 1 block
*/
if ((pa & L1_OFFSET) == 0)
break;
l2_slot = pmap_l2_index(va);
KASSERT(l2_slot != 0, ("..."));
pmap_load_store(&l2[l2_slot],
(pa & ~L2_OFFSET) | ATTR_DEFAULT | ATTR_XN |
ATTR_IDX(CACHED_MEMORY) | L2_BLOCK);
}
KASSERT(va == (pa - dmap_phys_base + DMAP_MIN_ADDRESS),
("..."));
}
for (; va < DMAP_MAX_ADDRESS && pa < physmap[i + 1] &&
(physmap[i + 1] - pa) >= L1_SIZE;
for (; va < DMAP_MAX_ADDRESS && pa < physmap[i + 1];
pa += L1_SIZE, va += L1_SIZE) {
l1_slot = ((va - DMAP_MIN_ADDRESS) >> L1_SHIFT);
/* We already have an entry */
if (pagetable_dmap[l1_slot] != 0)
continue;
pmap_load_store(&pagetable_dmap[l1_slot],
(pa & ~L1_OFFSET) | ATTR_DEFAULT | ATTR_XN |
ATTR_IDX(CACHED_MEMORY) | L1_BLOCK);
}
/* Create L2 mappings at the end of the region */
if (pa < physmap[i + 1]) {
l1_slot = ((va - DMAP_MIN_ADDRESS) >> L1_SHIFT);
if (l1_slot != prev_l1_slot) {
prev_l1_slot = l1_slot;
l2 = (pt_entry_t *)freemempos;
l2_pa = pmap_early_vtophys(kern_l1,
(vm_offset_t)l2);
freemempos += PAGE_SIZE;
pmap_load_store(&pagetable_dmap[l1_slot],
(l2_pa & ~Ln_TABLE_MASK) | L1_TABLE);
memset(l2, 0, PAGE_SIZE);
}
KASSERT(l2 != NULL,
("pmap_bootstrap_dmap: NULL l2 map"));
for (; va < DMAP_MAX_ADDRESS && pa < physmap[i + 1];
pa += L2_SIZE, va += L2_SIZE) {
l2_slot = pmap_l2_index(va);
pmap_load_store(&l2[l2_slot],
(pa & ~L2_OFFSET) | ATTR_DEFAULT | ATTR_XN |
ATTR_IDX(CACHED_MEMORY) | L2_BLOCK);
}
}
if (pa > dmap_phys_max) {
dmap_phys_max = pa;
dmap_max_addr = va;
......@@ -687,8 +620,6 @@ pmap_bootstrap_dmap(vm_offset_t kern_l1, vm_paddr_t min_pa,
}
cpu_tlb_flushID();
return (freemempos);
}
static vm_offset_t
......@@ -791,11 +722,8 @@ pmap_bootstrap(vm_offset_t l0pt, vm_offset_t l1pt, vm_paddr_t kernstart,
max_pa = physmap[i + 1];
}
freemempos = KERNBASE + kernlen;
freemempos = roundup2(freemempos, PAGE_SIZE);
/* Create a direct map region early so we can use it for pa -> va */
freemempos = pmap_bootstrap_dmap(l1pt, min_pa, freemempos);
pmap_bootstrap_dmap(l1pt, min_pa, max_pa);
va = KERNBASE;
start_pa = pa = KERNBASE - kern_delta;
......@@ -827,6 +755,8 @@ pmap_bootstrap(vm_offset_t l0pt, vm_offset_t l1pt, vm_paddr_t kernstart,
va = roundup2(va, L1_SIZE);
freemempos = KERNBASE + kernlen;
freemempos = roundup2(freemempos, PAGE_SIZE);
/* Create the l2 tables up to VM_MAX_KERNEL_ADDRESS */
freemempos = pmap_bootstrap_l2(l1pt, va, freemempos);
/* And the l3 tables for the early devmap */
......
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